Marvin b



(No Model.) r 2 Sheets-Sheet 1'.

M. B. GRIST. v WOOD BMBOSSING MAGHINE.

No. 516,162. Patented Dec; '5, 1893.

WITNESSES: INVENTOH ml. j

A7TORNE).

m: "Anon/u. umoGnAPHlNa COMPANY.

WASHINGTON. D. c.

N Model.) '2 Sheets-Sheet 2.

v M. B. ORIST.

WOOD EMBOSSING MACHINE. No. 510,162. Patented Dec. 5, 1893.

WITNESSES: INVENTOI? Xi, 76? 50m,

A TTOHNEY.

mi NATIONAL umoummmu count" :0 at N above the upper surface of thetable.

UNITED STATES PATENT QFFICE.

MARVIN B. ORIST, OF INDIANAPOLIS, INDIANA.

WOOD-EMBOSSlNG MACHINE.

SPECIFICATION forming part of Letters Patent No. 510,162, dated December5, 1893.

Application filed April 3,1893. Serial No. 468,779. (No model.)

To aZZ whom it may concern:

Be it known that I, MARVIN B. ORIsT, a citizenof the United States,residing at Indianapolis,in the county of Marion and State of Indiana,have invented a new and useful Improvement in Wood-Embossing Machines,of which the following is a specification.

My invention relates to an improvement in that class of wood-embossingmachines in which the embossing is producedb y means of a cylindricaldie.

The object of my improvement is to provide improved means for turningthe die-shaft by hand and for preventing the longitudinal movement ofthe die-shaft, all as hereinafter fully set forth. t

The accompanying drawings illustrate my invention.

Figure 1 represents a side elevation of a wood-embossing machine havinganti-friction-roll bearings for the die-shaft and provided with myimprovement. Fig. 2 represents a front elevation of the upper part ofthe machine. Fig. 3 represents, 011 an enlarged scale, a diametricallongitudinal section of the die-shaft and one of its end bearings,showing the means for preventing the longitudinal movement of the shaftand for turning the shaft by hand for the purpose of adjusting therelation of the die to the work. Fig. 4 represents an end elevation ofthe shaft-holding device. Fig. 5 represents a plan of that portion ofthe die-shaft which engages the holding device shown in Fig. 4.

In the drawings, A, A, indicate the ends of the main-frame of themachine.

B, indicates the work-table which is mounted in the main-frame so as tobe vertically adj ustable therein, and which carries the pressure-roll,0, whose periphery projects sligltlg a1 pressure-roll is provided withsuitable mechanism, (not shown,) for rotating it.

The hollow die-shaft, D, carries the cylindrical die, E, which isopposed to the projecting peripheral surface of the pressure-roll G. Thedie-shaft is supported at each end, so as to resist upward pressure, inbearings, F, and O, which are each attached to the main-frame by meansof a pair of brackets, H, H, rigidly bolted to the frame and formingbearings which receive a pair of journals, I, I, which are formed on theends of the shaft-bearing, and whose axes are arranged at right anglesto the axis of the die-shaft, so that, whenthe die-shaft is defi ectedfrom its straight line by the passage of the material to be embossedbetween the pressure-roll and the die, the bearing turns on itsjournals, 1,1, and yields to the changed position of the die-shaft.Bearings F, and G, are each provided with a pair ofanti-friction-rollers, J, J, between the peripheries of which thedieshaft rests.

For the purpose of turning the die-shaft by hand, and for preventingendwise movement of the shaft when at work, a hollow hub, K, having atone end an outwardly projecting radial flange, L, and a pair of inwardlyproj ecting radial lugs, M, M, is mounted in a circular bearing, N,which is secured to the outer face of the shaft-bearing G. Each side ofthe flange L is provided with a circular groove, 0, and correspondinggrooves are formed in the inner opposed faces of the bearing N, andaseries of ballsT'P, P, are mounted in said grooves so as to form aball-bearing for the hollow hub K, which will resist endwise movement. Ahand-wheel, R, is secured to the outer end of hub K.

One end of the die-shaft is provided on opposite sides with openT-shaped slots, as at S, Fig. 5; which slots are adapted to receive andinterlock with the inwardly projecting lugs 'M, on hub K; so that, wheninterlocked, the

shaft isheld against longitudinal movement, and the hub revolves withthe shaft.

In operation, the material is to be embossed, passing between thepressure-roll and the die, springs the shaft to a greater or lessextent, and the bearings for the shaft, F, and G, yielding to thechanged position of the bearing surface of the shaft, are automaticallytilted in opposite directions, and all cramping of the shaft in itshearings, or unequal wearing of the contact surfaces of theanti-frictionrolls is avoided. The hub K, which prevents thelongitudinal movement of the shaft, being mounted in the bearing N whichis secured to the tilting shaft-bearing, necessarily follows themovement of said shaft-bearing and presents no obstacle to the freerotation of the flange, and the die-shaft adapted to interlock shaft.with said lugs, all arranged to co-operate sub- I claim as myinventionstantially as set forth. In a wood-embossing machine, thecombi- MARVIN B. CRIST. 5 nation of the hollow hub K having flange LWitnesses:

and lugs M, the circular bearing N provided H. P. HOOD,

with balls P and arranged to inclose said F. A. HETHERINGTON.

